We have investigated reactions between 1,3,5-tris(1-piperid-yl) benzene and 1,3,5-tris(4-morpholinyl)benzene and 4-sub-stituted arenediazonium tetrafluoroborate salts, mainly by NMR spectroscopic measurements. The main products are σ complexes (Wheland-like intermediates) which are formed in almost quantitative yields and are moderately stable com-pounds. From these covalent complexes, products of the azo-coupling reaction may be obtained as salts or as free bases.
First Evidences for the Wheland Intermediates in Azo-coupling Reaction. Reactions between 1,3,5-Tris(N,N-dialkylamino)benzene and Arenediazonium Salts
BOGA, CARLA;DEL VECCHIO, ERMINIA;FORLANI, LUCIANO
2004
Abstract
We have investigated reactions between 1,3,5-tris(1-piperid-yl) benzene and 1,3,5-tris(4-morpholinyl)benzene and 4-sub-stituted arenediazonium tetrafluoroborate salts, mainly by NMR spectroscopic measurements. The main products are σ complexes (Wheland-like intermediates) which are formed in almost quantitative yields and are moderately stable com-pounds. From these covalent complexes, products of the azo-coupling reaction may be obtained as salts or as free bases.File in questo prodotto:
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